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patch 9.1.1802: 'nowrap' in a modeline may hide malicious code

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Problem:  'nowrap' in a modeline may hide malicious code.
Solution: Forcibly use '>' as 'listchars' "extends" if 'nowrap' was set
          from a modeline (zeertzjq).

Manual `:setlocal nowrap` disables this behavior.  There is a separate
problem with `:set nowrap` that also applies to some other options.

related: #18214
related: #18399
closes: #18425

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
zeertzjq
2025-09-28 17:29:19 +00:00
committed by Christian Brabandt
parent ad43d2639d
commit 9d5208a931
7 changed files with 84 additions and 12 deletions
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src/structs.h
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@@ -4214,6 +4214,7 @@ struct window_S
#define GLOBAL_WO(p) ((char *)(p) + sizeof(winopt_T))
// A few options have local flags for P_INSECURE.
long_u w_p_wrap_flags; // flags for 'wrap'
#ifdef FEAT_STL_OPT
long_u w_p_stl_flags; // flags for 'statusline'
#endif